One detective wrote that the police's "investigation has revealed that the scene may have been altered and staged by the suspect," WUSA-TV reported.

Authorities said in the warrant that Megan Hargan, a second daughter living in the McLean, Virginia, home, allegedly attempted fraudulent wire transfers from a financial account belong to her mother the day before the murder and the day of her death, WUSA-TV said.

Police said Megan Hargan lived in the home with her younger daughter with the other family members, per WUSA-TV.

In a twist reported in July, it was the boyfriend of one of Pamela Hargan's daughters, who lives in Dallas, who initially contacted police about the shooting, WUSA-TV reported then. Media reports did not identify who the Dallas man was dating but said she lived in the Hargan home.

"Caller is third party, says his girlfriend called him and advised that her sister (Helen) killed her mother," a dispatcher for Fairfax County Police said, WUSA-TV wrote in July. "Caller lives in Dallas, Texas, and the girlfriend lives out of address 6708 Dean Drive. No one's answering the phone."

Authorities said no suspects have been named in the incident but the case remained "very active," WUSA-TV wrote.